C 80* ) 
1 thought it not amifs, in order to the cleariog of the do^bt^ 
to make feme Trials with contiguofu Liquors ^ whereof one 
would coatinue fluid when the other had loft its fluidity. 
I took then Oi/^/ JnnifeeAs^ thaw'dby a gentle warmth, 
znd ummon Water ^ and having put them together in a conveni- 
ently fhapedGlafs, they wcrefufFer'd to ftand in ^ 
£xp.xx. cold place till the Oil was coagulated; which dorte, 
it was parted from the Water, and by the roughnefs 
of its/i^/'fr/fwVimanifefted, as I expefted, that^when its parts 
were no longer agitated and kept eafily difplaceable by the 
fnbtile permeating matter, or whatever other Agent or Caufe 
it were, to which it ow'd its Fluidity^ then the contiguous 
Water grew unable to infleftj or otherwire pace them afrcr the 
manner rtquifitt to coniWiViiftz fmooth [urface. And what hap- 
pen'd to that part of the Oils furface that was touched by the 
Water, happen'd alfo to that which was contiguous to the Air ; 
fave that the ajperity of the laft nam'd furface was differing from 
the other, which , Whether 'twere an accidental or conftant 
vf^rtg'/ii^^w/^tf/^, further Trial muft determine. But I have often 
obferved, that the upper furface of Oil of Annijeeds^ when 
this Liquor comes to be coagulated by the cold Air, was far 
enough from being fmoorh, being varioufly aQperated by many 
flaky particles, iTome of which lay with their broad, and others 
with their edg*d, parts upwards. 
hxi inepWty diXid r,u^gedne[s fuferjicies I have alfo ob- 
ferv*d in Water, when, having cover'd it with Chymical Oilof 
Junifery and expos'd is in very Coid weather^ 
Exp.xxi. though the Oil continued fluid, yet the Water, being 
frozen, had no longer a fmooih fuper^cies, as whilft in 
its liquid ftate 't5vas contiguous 10 the Oil. And the like Ine- 
quality, or irathef a greater, we obferved in the furface of Water 
frozen, which had Chymical Oil of Turpentine fwioiming over 
it; yet a no lefsjf not a much greater, roughnefs may be often- 
times bbterv^d ih thefurface^ of divers Liquors^tbat abound 
with Water, wheu thofe Liqiij>rs being frozen , the'it furfaces^ 
have an immediatecoataa with tfa^ Air* Thi;^ I> among others,, 
(elfewhcre) obferved 3 And 1 ftall here adcl,that haying pur-i 
pofely caufcd a ftrong and blood-red decoftion of the Soot of 
WoddtqKpe expofed in a large Glafs iq ayery Cold nigtt , I wasi 
.more|ilca|e^^ ^^^ij»J]uigpriz*d, to find in the morning a Cake, o^ 
